#!/usr/bin/perl -w
#
# Author: Jesse Waite
# Plugin: earthquakes
# License: GPL v2
# Version: 1.0
#
# Plugin to retrieve earthquake data from earthquake.usgs.gov
#
# Parameters supported:
#    config
#    autoconf
#
# Requirements:
#    LWP::Simple
#
#  $Log$
#  v. 1.0 11/04/2008 Initial release.
#  v. 1.1 11/08/2008 Fixed misspelling of GAUGE.
#
# Magic markers:
#%# family=auto
#%# capabilities=autoconf

use strict;
use warnings;

# place locations here separated by commas
# names must match Region from the link below
my @regions = ("Southern California",
               "Central California",
               "Northern California",
               "Greater Los Angeles area");

my $url = "http://earthquake.usgs.gov/eqcenter/catalogs/eqs1hour-M1.txt";

# checks if LWP::Simple is installed
my $ret = undef;
eval { use LWP::Simple };
if ($@) {
  my $ret = "LWP::Simple not installed.";
}

if (defined $ARGV[0] and $ARGV[0] eq "autoconf")
{
  if (defined $ret)
  {
    print "no ($ret)\n";
    exit 1;
  } else {
    print "yes\n";
    exit 0;
  }
}

if (defined $ARGV[0] and $ARGV[0] eq "config")
{
  print "graph_title Earthquakes by region\n";
  print "graph_args --base 1000\n";
  print "graph_category other\n";
  print "graph_info This graph shows earthquakes by region of magnitude 1.0 or greater.\n";
  print "graph_vlabel Number of Earthquakes\n";

  for my $locale (@regions) {
    $locale =~ s/\s/_/g;	# replace whitespace with underscores
    print "$locale.label $locale\n";
    print "$locale.type GAUGE\n";
    print "$locale.draw LINE2\n";
    print "$locale.warning 4\n";
    print "$locale.critical 6\n";
  } # end for loop
  exit 0;
} # end if

# fetch the most recent earthquakes
my $content = get($url);

# pull the regions and count how many times they are mentioned
for my $locale (@regions) {

  my $i = 0;

  foreach my $key (split(/[,|\n\r]/, $content)) {
    $key =~ s/"//g;	# remove quotes
    if ($key eq $locale) {
      $i++;
    }
  } # end foreach loop
  $locale =~ s/\s/_/g;	# replace whitespace with underscore
  print "$locale.value $i\n";
} # end if